Table 3.
The results of the Alpha waves examination (waves from C3, C4 channels).
| Mode | Pre-COVID | Post-COVID | p | |
|---|---|---|---|---|
| C3, eyes open | mean ± SD | 6.74 ± 0.74 | 6.84 ± 2.42 | p = 0.538 |
| Median | 7.08 | 6.42 | ||
| Quartiles | 6.19–7.18 | 6.06–6.61 | ||
| C4, eyes open | mean ± SD | 6.58 ± 0.59 | 8.95 ± 2.64 | p = 0.001 * |
| Median | 6.49 | 8.54 | ||
| Quartiles | 6.08–6.99 | 7.71–9.82 | ||
| C3, eyes closed | mean ± SD | 6.02 ± 0.73 | 6.34 ± 0.35 | p = 0.042 * |
| Median | 5.85 | 6.4 | ||
| Quartiles | 5.43–6.38 | 6.04–6.58 | ||
| C4, eyes closed | mean ± SD | 6.36 ± 0.78 | 7.95 ± 1.31 | p = 0.001 * |
| Median | 6.17 | 8.04 | ||
| Quartiles | 5.83–6.99 | 7.33–8.81 | ||
p-Wilcoxon paired test. * statistically significant (p < 0.05).